Reversing-valve for gas-furnaces.



S. PARISH.

REVERSING VALVE FOR GAS FURNACES.

v APPLICATION Him) AUG.17.19I 7.-

Patented May 28,1918.

IIIMIWEINI'WW 111i WWWEW STEPHEN RARISH, OF STEUIBENVILLE, OHIO.

REVERSING-VALVE FOR- GAS-FURNACES.

menses.

To all whom it may conccra I 'j Be it known that. I, ,Srnrnnivj PARISH, a citizen of the United States of America, and residentfof Steubenville, county of Jeifer son, and State of. Ohio, have invented certain new and useful Improvements in Re versing-Valves for Gas-Furnaces, of which the following is a specification.

This invention relates broadly .to reversing valves for furnaces, and more particularly to an improved reversing-valve of the butterfly type. f.

The primary object ofthe invention is to provide a reversing-valve for gas furnaces having automatically actuated means for protecting theends of the butterfly valve from the warping effect of the intense heat of the products of combustion which are directed thereagainst.

A further object is to provide means for effectively scaling the joints at that end of a valve of the character mentioned which is most liable to become warped by intense heat, so that gas passing from the generator into the furnace will not escape into the stack.

A still further object is to provide a valve of the character mentioned having a 'casing which can be cast in sections and the latter bolted together instead of being cast in one piece thusfnot only simplifying manufacture butalso providing for ready access to all parts of the structure. j 1

With these and other objects in view, the invention residesin the features of construction, combination of elements and arrangement of parts which will hereinafter be fully described, reference being had to the accompanying drawings, in which Figure 1 is a side elevation of a reversing-valve for gas; furnaces embodying my invention; y 1 1 Fig. 2 is a lo gitudinal' section of the same; and- Fig. 3 is a transverse section t stantially on the line 3-3, Fig. 2.

Referring to said drawings, in which like designating characters distinguish hke parts throughout the several views- 1 i dicates a box-like middle casing section which is open at both ends, flanges 2 and 3 being provided around theend openings thereof. Said flanges have bolted thereto similar flanges 4 and 5 of two s1m1- lar end casing sections 6 and 7' which are in open communication through their lower aken sub;

"Specification of Letters Patent.

Patented May as, 191%.

a lication filed A emia 1917. Serial No. 186,739.

sides with the opposite sides of a gas furnace (not shown). I The end sections 6 and .7 are provided with" suitably located ports or manholes 8' and 9through which access to their interiors maybe had when occasionrequires. Said ports are normally closed by removable heads 10 and 11. y

Formed integral with or rigidly attached to the middle casing section 1 at its topmost portion is a tubular neck portion 12 alf0rdmg a passage 13 through which gas passes from a generator (not shown)to the interior of easing section 1. An outlet port 145 is provided at the bottom of said section 1 through. which the products of combustion may pass to a stack (not shown). p

A shaft 15 extends transversely across the center of the middle casing section 1 andhas attached thereto interiorly of said section a butterfly-valve 16 which extends completely 3 across the interior of said section. Said valve is designed to divide the interior of said section 1 into two separate passageways when at its limits of movement, one

passageway connecting the source of fuel supply with one side of the furnace and the other connecting the other side of. tliefur nace with the stack;

Formed in the casing section" oppo site sides of the inlet passage 13 are re cesses 17 and .18 in 'whichflthe upper end 16 of. the butterfly valve 16 seats when the latter occupies its limits of movement;

shoulders 19 and 20 protecting said upper end ofsaid valve from'the' heat and the resultant warping effect of the products of combustion issuingfrom the interior of the furnace. l l 1 Mounted upon the interior wallsof the cas-j ing section 1 are stop blocks or abutments 21 and '22 against which thesides of the'valve Mounted on trunnions25 "and 26rotatab1y received within the interior sidewalls of 16 seat when occupyingpositions at the said. section 1 and havingtheir pivoted edges disposed closely against the tongues 23 and2t, are oppositely disposed valve-like shields .or wings 27 and 28 adapted to have their-free edges seat against the adja'cent face of valve 16 when said valve occupies a position at one of its extremities of movement, and adapted to have their free edges swing downward to aneut of the-way posi tion when not in operation, as clearly 'shownin Fig, 2. Said wings effectual-1y shield the lower end of the valve 16 from the heat and the resultant warping effect. of the intensely heated products of combustion passing from the interior of the furnace to the'stack, and,

du 9. the lo fi between th ng an the tongues and valve, also prevent gas passing from the generator to the furnace rein ,scaping into'thepassage leading to the .s a'ckf end the shaft 15 extends outward through the walls of easing section 1 and hasrigidly mounted thereon a crank 29 of a substantially inverted Y-shape, said crank section 1 and carrythereon crank arms 31 and :32 the outer ends'of, which are connected to the. diyergent arms. 29 and 29 of crank 29, as by chains 33 and 34. The chains are of such length, and the cranks 3lland 32 are so disposed on their trunnions I with respect to wings 27 and 28 that when valve 16 is swung tonne of its limits of niovement the free end of the wing adj acent't -i l e dg is f rcibly raw pward tightly thereagainst and the opposite Wise- P rm tted t ss n t s sta h e re i e.

. the siti amiab ewe ccupy' the n0- s onn n u l. l n s in F gset I .fmmtli n tes er the 'iir t cr o cases se t on 1 hre eh i l Pa a 1. and passes 'hen e, down rd hrens an en secti n nto n sid cf. th furnace; nee thesemetime e prede ts- 0 v ombustion issuing from the opposite side of hsfnmace sa s upwa d ietaand tli eus thnppo teen s ction an la the i r 9 n t seeing. rfvh r he ar ted dewew rd through utlet 1 0M01 by he I butterfly valve 16fand thence to the stack es snbt ns wh n e nv ble P ts epythepesi ipne Shown in d ifi d n n said ,isare'th di e t on cf rav f a throughthe .furnace is reversed.

clematis:

'"' LA ver ug va v fo g s urnac com rising casing having inlet and outlet Pa t therei n 'h ms Pa s diee c apposit Sides: o th um a b t- I terflye lvercte eb y. d sp W h n ai casin e dd isned 9 de in e hee-wt n ev tw ,i epe e t nu pee sages, recesses formed in the interior of said casing for receiving the upper end of said valve means for shielding the lower end of said valve from contact with the products of combustion passing through said casing, a substantially Y-shaped crank associated with said valve for rotating the latter, and means associated with the disages, wings pivoted in said casing and designed to shield the lower end of said valve from the warpin effect of products of combustion issuing thereby, means for operating said valve, and means associated with said valve-operating means whereby said valveshielding means are automatically actuated.

3. A reversing-valve for gas furnaces comprising a casing having inlet and outletports therein and having passages leading to opposite sides of the furnace, a butterfly-valve rotatably disposed within said casing and designed to divide the interior thereof into two separate continuous passages, recesses formed in the interior of said casing for receiving the upper end of said valve, wings pivoted in said casing and designed to shield the lower end of said valve from the warping effect of products of combustion issuing thereby, means for operating said valve, and means associated with said valve-operating means whereby said valve-shielding means are automatically actuated.

4. A reversing-valve for gas furnaces comprising a casing having inlet and outlet ports therein and having passages leading to optposite sides of the furnace, a rotatable shaft directed transversely through the center of said casing, a butterfly-valve fixed on said shaft within said casing and designed to dividethe interior thereof into two separate contlnucus passages, recesses. formed in the interior of said casing for receiving the upper end of said valve, wings having integral trunnions received in opposite sides of said casing and on which said wings are rotatable, said wings being designed, when in one position, to protect the lower end of said valve from contact with heated products of combustion, a crank mounted upon one extremity of said shaft whereby said valve may be shifted, said crank having a pair of divergent arms, and means connecting said arms with said trunnions whereby said wings are operated.

5. reversing-valve for gasfurnaces compris ng a casing having inlet and outlet ports therein and having passages leading to 0pposite sides of the furnace, a rotatable shaft directed transversely through the center of said casing, a butterfly-valve fixed on said shaft within said casing and designed to divide the interior thereof into two separate continuous passages, recesses formed in the interior of said casing for receiving the upper end of said valve, wings having integral trunnions received in opposite sides of said casing and on which said wings are rotatable, said wings being designed, when in one position, to protect the lower ends of said valve from contact with heated products of combustion, a crank mounted upon one extremity of said shaft whereby said valve may be shifted, said crank having a pair of divergent arms, cranks fixed to the outer ends of said trunnions, and chains connecting the extremities of the last-mentioned cranks with the extremities of the divergent arms of said first-mentioned crank.

6. A reversing-valve for gas furnaces comprisinga casing having inlet and outlet ports therein and having passages leading to opposite sides of the furnace, a rotatable shaft directed transversely through the center of said casing, a butterfly-valve fixed on said shaft within said casing and designed to divide the interior thereof into two separate continuous passages, recesses formed in the interior of said casing for receiving the upper end of said valve, wings having integral trunnions received in opposite sides of said casing and on which said wings are rotatable, said wings being designed, when in one position, to protect the lower ends of said valve from contact with heated products of combustion, a crank mounted upon one extremity of said shaft whereby said valve may be shifted, said crank having a pair of divergent arms, cranks fixed to the outer ends of said trunnions, and chains connecting the extremities of the last-mentioned cranks with the extremities of the divergent arms of said first-mentioned crank, said chains being of such length and said lastmentioned cranks being so disposed with respect to said wings that when said valve occupies one of its limits of movement the free end of the wing adjacent to the lower edge of the former is forcibly drawn upward against said valve.

7. A reversing-valve for gas furnaces comprising a casing having inlet and outlet ports therein and having passages leading to opposite sides of the furnace, a rotatable shaft directed transversely through the center of said casing, a butterfly-valve fixed on said shaft within said casing and designed to divide the interior thereof into two separate continuous passages, recesses formed in the interior of said casing for receiving the upper end of said valve, wings having integral trunnions received'in opposite sides of said casing and on which said wings are rotatable, said wings being designed, when in one position, to protect the lower ends of said valve from contact with heated products of combustion, a crank mounted upon one extremity of said shaft whereby said valve may be shifted, said crank having a pair of divergent arms, cranks fixed to the outer ends of said trunnions, and chains connecting the extremities of the last-mentioned cranks with the extremities of the divergent arms of said first-1nentioned crank, said chains being of such length and said lastmentioned cranks being so disposed with r spect to said wings that when said valve occupies one of its limits of movement the free end of the wing adjacent to the lower edge of the former is forcibly drawn upward against said valve and the opposite wing is permitted to swing to an out-of-the-way position.

In testimony whereof, I aflix my signature in presence of two subscribing witnesses.

' STEPHEN PARISH.

Witnesses:

A. G. MOMULLEN, W. MoD. MILLER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. O. 

